Door or window lock



FIG. 1 is a perspective view of a door or window lock in locked condition showing my new design;

FIG. 2 is a side elevational view thereof in unlocked condition;

FIG. 3 is a top plan view of FIG. 2;

FIG. 4 is a bottom plan view of FIG. 2;

FIG. 5 is a front elevational view of FIG. 2; and

FIG. 6 is a rear elevational view of FIG. 2. 

The ornamental design for a door or window lock, substantially as shown. 